已知x与y之间的关系如下表 X135 y4815 则y与x的线性回归方程为y=bx+a

 已知xy之间的关系如下表

X

1

3

5

y

4

8

15

yx的线性回归方程为y=bx+a必经过点 (   

    A.(39       B.(37       C.(3.58     D.(49

答案

A

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